Sight glass mounting and adjusting means



3 age f both of the glasses Which are used in my sight glass The sightglass includes a holder Which I have designated in its entirety by thenunleral 3 This holder holds and maintains the pair of glasses in properp0siti0n, as Will be clearly explained- The h01der 13 comprises a ringor annular men1ber 5 0f a dianleter Which is greater than the diameterof the opening 3 irl the wall of the 0vV line, tank or the like, and the0 D. of the Ting 15 iS Substantially the Sane aS the diameter of thearea dened between dia1T1etfically opposed p0ints on the shoulder 7 0fthe annular pt0jection 5. The ring or annulus 1[5 is of SubstantialWidth, suicient Width to ac commodate a pair of glasses With theirSealing and ad j11sting means.

Intenediate the width 0 f the ring 15 is a radially inwardly extendingflange l7, the Width of Which, aS will bec0ne clear, deterInines theSpacing betvveen the pair of glasses Which are used in the sight glassC0Inbination The Sight glass combination includes an inner glass l andan outer glass 21, Which are Spaced apa[t when they are Inounted in theC0Ebination' The dian1eter of the glasses 19 and zl are substantiallythe sanle as the I.1) of the ring 15.

I provide an annular Sealing gaSket Z3 vvhich iS Of a width which issubstantia11y equal to the Width of that portion of wall l betwcenshouldef 7 and the edge of the 0pening 3, S0 that the external edge orperiphely of thiS Sealing gasket abuts against the shoulder 7, and theinner edge Ol periphery there0f is in line With the edges of the opening3 and the entire inner iiat Surface 0f the sealing gasket z3 iS inengagement With the wall l. The inner glass 19 is I0Sitioned betvveenthe Hange 17 and abuts and Seals against the sealing gasket 23 and Whenthe sight glass combination iS installed in operative POSition, theinner glass forces the gasket z3 against the wall l in Sealing relationwith respect theret0.

I provide a'fufther Sealing gasket zs which is dinlen Sionally the SameaS the Sealing gasket z3 and function8 in generally the Same manner Theouter gass zl is 0Sitioned between the ange 17 and the sealing gasketzs, and when the c0mbination is operativey installed, the outer glass 21Will abut and press against the gasket 25 to force it int0 sealingengagen1ent vvith the ring and With the outer glass ()Ile (yf theSignicant characteristics of IIly invention resides in the noveladjusting feature, for the glasses l and zl, Which I have devised Theglass discs which are llsed f()l the glasses l and l, aS Teceived, areSubject to variations in the thickness there0f and, as I Shall explain,taking into account the thickness of the glass iS inportant in pr0viding'a Sound Seal, and in preventing the breakage or blowing out of bothglasses vvhich, aS eX lained, is a Serious and dangerous 0ccurfence.

It is ilortant that the exterior surface of glass zl be in the sameplane as the vertical plane 0f the Outer edge 27 of the ring l5 0f theholder l3, and it iS i1T )0rtant that the interior Surface of the glassl be in the San1e plane as the vertical plane Of the inner edge z9 0fthe Ting 15 0f the h01der 13. Such Structural felationships insureproper sealing, particularly Shoud the inner glass 19 break, Since, Withthe af0rementioned c0- anar relationship betvveen the exterior Surfaceof the outer glass zl and the edge z7 0f ring l5 a tight sealing fit iSassured between the glass zl and the gasket 25 t0 thereby )re Ventleakage until a Shutdovvn tlay be nlade to replace the broken glass.

It is recognized that th glass may be recision ground S0 as to provideunif0rIn and desifed thickness in the glass discs. IIovvever, Suchgtinding is costly and time c0nsuming, and I have devi5ed Ineans inCOInbination with the novel h0lder I have described Whereby grinding isunnecessary and the thickness vatiation is readily taken int0 accountand the usual problel11s 0ccasioned theTeby are overcome.

II1 o der to take int0 account this glass thickness vai tion, I employ apair of non-c0mptessib]e gaskets 3l, olle being disposed between theHange 17 and the extelior Surface Of the innef glass 19 while the 0theris disposed between the Hange 17 and the interior surface of th outerglass Z. IIOW I TO 0Se t0 use n0n-con]pressible gaskets 31 0f varyingSizes, depending upon the thick11ess of the glasses 19 and 21. Thus, byusing or preselecting non compressible gaskets of varying thickness, Ian1 nabled t0 0btain the desired structural relationships, that iS, bythis sirnple nleans, I can insure that the interior Surface of glass i9Will be c0-1)lanar vvith the edge 29 t0 thereby 0btain the desiredSealing results as p0inted out above.

It iS Wihin ny contenpati0n to use lalninated 1eta], OT the like mateialgaskets 31, as illustrated in FI(.... 4 SO that by peeling 0 One or moreof the la minations, the thickness of the gasket being used may bealtered to thereby properly place and p0sition he 'glasses 1 and zl,

It Vill nOW be appreciated that either of the noncon1- pressible gaskets31 and 3 are coactive vith and in engagement with the hOder and arecoactive wih and in en gagement vvith each of the glasses S0 that theI)0Sitions of the glasses relative t0 the holder may be adjustedaccording to the thickness of the gaskets preselected to insure that theinterior Surface of glass L Will be c()l)1-anar vvith the edge 2 and theexteri0r Surface of glass 21 Will be coplanar wvith the edge 27 0f theholder It vill, Of course, be underst00d that the sight glass c0nbinati0n is instaned and the COInponents there0f I1aintained in theirdesired operative Siti0ns by Ineans of the ring and the bolts 11, andfhat these components are tghtIy held together by tightening the nuts 12the proper anOunt.

I Claim:

A Sight glass including, in cO1binatiOn an inner glass and an outerglass, nleans for TI011nting Said glass in position covering and Sealingan 0pening in a illid containing member, Said Ineans including a holderfor the glasses, said holder being provided With in11er and outer edgesand said lg] asses being circular, and further Inean3 coactive with andin engagement With the holder and coactive With and in engagefnent Witheach of said glasses, and Said further Ineans being preselected toPOSition the outer Surface of the Outer glass in the plane of the saidoter edge of the holder and t0 1)0Sition the inner Surface of the innerass in the plane 0f Said in11er ed ge of the h0lder' z A Sight gl assill accordance with claim l, Wherein Said holder for the glassesC0Inprises an annular element of greater vvidth than the C0Inbinedthickness of he glasses, and Said annular elenent iS provided v/ith aradially invardy extending an'ge intermediate the edges of Said annularelenent, and the inner glass of Said laSSeS is positioned on the innerSide of said radially inwardly extending i lange, vvhile the outer glassis ositioned on the outer Side of Said radially inw ardly extendin angeSaid further nleans is positiond betvveen said radiany illvvardlyextending ]'iange and said inner glass and is further positionedbetvveen Said radially inwardly extendi1]g ange and Said outer glass 3-A sight glass in accordance with clam z, Wherein Said fufther meansconlprises n0ncolnpfessib]e gasketS.

4, A Sight glass includig, in combination, a uid containing Ine11]berhaving an opening therein, TleanS C10Sing and sealing Said opening t0prevent leakage 0f llid there through, Said TIleans C0In rising an innertransparent glass and an outer transparent glass, a h0lder for theglasses, Said holder c0mprising an an1ular element of a Width greaterthan the c0mbined thickness of the inner and outer glasses and beingprovided with a adially inwardly extending ange intern1ediate fhe innerand outer edges 0f Said annular element, said inner glaSS being disposedon the inner Side of said Tadially inwardly extending age and the outerglass being disposed on the outer Side there0f, noncon1pressible nleansbeing OSitioned between the radially inwardly extending ange and theinner and OL]tel

